package object;

/**
 * 说明:
 *
 * @author: luohaowei
 * @date:2023/3/1
 **/
public class IntegerDemo {
    public static void main(String[] args) {
         int max=Integer.MAX_VALUE;
         int min=Integer.MIN_VALUE;
        System.out.println("int的最大值为:"+max+",最小值为:"+min);
        long max1=Long.MAX_VALUE;
        long min1=Long.MIN_VALUE;
        System.out.println("long的最大值为:"+max1+",最小值为:"+min1);
        String s1="39";
        int age=Integer.parseInt(s1);
        System.out.println(age);
        String s2="19.87";
        double price=Double.parseDouble(s2);
        System.out.println(price);





























        /*

        Integer i1=new Integer(5);
        Integer i2=new Integer(5);
        System.out.println(i1==i2);
        System.out.println(i1.equals(i2));
        Integer i3 =Integer.valueOf(5);
        Integer i4=Integer.valueOf(5);
        System.out.println(i3==i4);
        System.out.println(i3.equals(i4));
        int i=i4.intValue();
        System.out.println(i);

         */
        /*
         Integer i=5;
         int j=i;

         */
    }
}
